MPD techniques have being applied to drill zones with major fluid losses or narrow operational window. Nevertheless, subsequent operations are not yet at the same stage of development: Wireline logging, running casing and cementing are still challenging and need further development when it comes to DP rigs. Therefore, after drilling a well with hydrostatically underbalanced fluid and surface backpressure, it is necessary to replace the drilling fluid in order to continue the operations. Although, in nearly all MPD wells it is possible to do this, the major challenges are zones with absent drilling window and severe losses where PMCD technique is required. In these cases, it is not possible to use overbalanced drilling fluid. This paper presents a solution for wireline logging while using MPD techniques on DP rigs with underbalanced drilling fluid. At first, it shows the planning phase and its discussion, then the execution phase with its difficulties.
Number of Pages
Kyi, K.K., Nathan, K., Haddad, S., Wa, W.W., Lee, A.O.K., and Hui, G.H.N., 2016. New Development in Wireline Logging Under Activated Pressurized Mud-Cap Drilling Enabled Fractured Carbonates Evaluation. 2640-MS Offshore Technology Confference 2016.
Looking for more?
Some of the OnePetro partner societies have developed subject- specific wikis that may help.